CLN: fix test name and array_with_unit_to_datetime docstring

Author: AlexKirko

pandas/_libs/tslib.pyx

@@ -316,8 +316,9 @@ def array_with_unit_to_datetime(ndarray values, ndarray mask, object unit,
     ----------
     values : ndarray of object
          Date-like objects to convert
-    mask : ndarray of bool, default None
-         Not-a-time mask for non-nullable integer types conversion
+    mask : ndarray of bool
+         Not-a-time mask for non-nullable integer types conversion,
+         can be None
     unit : object
          Time unit to use during conversion
     errors : str, default 'raise'

pandas/tests/indexes/datetimes/test_tools.py

@@ -2293,7 +2293,7 @@ def test_should_cache_errors(unique_share, check_count, err_message):
         tools.should_cache(arg, unique_share, check_count)
 
 
-def test_intarray_to_datetime():
+def test_nullable_integer_to_datetime():
     # Test for #30050
     ser = pd.Series([1, 2, None, 2 ** 61, None])
     ser = ser.astype("Int64")